Lock for elevator-doors.



No. 669,622. I Patented Mar. 12, 190:. A. m. COYLE.

LOOK FOR ELEVATOR DOORS.

(Application filed July 23, 1900.) (No Model.) 2 SheetsSheet-|.

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No. 669,622. Patented Mar. l2, l90|.

A. M. BOYLE.

LUCK FOB ELEVATOR DOORS.

(Application filod- July 23. 1900,)

U 17 M rm Nrrnn Smarts ANDREW M. OOYLE, OF YONKERS, NEW YORK, ASSIGNOR TO THE OTIS ELEVATOR COMPANY, OF EAST ORANGE, NEW JERSEY.

LOCK FOR ELEVATOR-DOORS.

SPECIFICATION formingpart of Letters Patent N 0. 669,622, dated March 12, 1901.

Application filed July 23. 1900.

To otZZ whom it may concern:

Be it known that 1, ANDREW M. OoYLE, a citizen of the United States, residing at Yonkers, in the county of Westchester and State of New York, have invented certain new and useful ImprovementsinLocks for Elevator- Doors, of which the following is a specification.

My invention relates to that class of looking means employed in connection with elevator-doors at elevator-landings and intended not only to fasten and release the doors, but also to control the operation of the elevator mechanism to prevent the same from moving the cage when the doors are not closed; and my invention consists in constructing the parts as fully set forth hereinafter and as illustrated in the accompanying drawings, in which Figure l isa diagrammatic view illustrating the arrangement of the locking devices in connection with parts of an elevator apparatus. Fig. 2 isa sectional elevation of the looking devices. Fig. 3 is an outside view of the keeper-case. Fig. i is a face View of the keeper-case; Fig. 5, a detached view illustrating part of a cage and device for operat ing the contact-piece from the cage.

The latch A, as shown, is a slidable latch and is carried by the door of the elevatorlanding and generally in a latch-case B, provided with a handle and means for moving the latch therefrom. As shown, there is a spindle 1, with a cross-arm 2 engaginga pendent lever 3, which engages the latch and is held against the cross-arm by a spring 4:, so that the latch is withdrawn by rocking the spindle in either direction. There is connected with the latch, so as to be moved thereby, an electrical bridge 0, which serves to connect electrically two electric terminals 5 5, carried by the opposing door-jamb, or by the other door-leaf if the door has two leaves, and so that as the door is closed an electric circuit is completed between the terminals and through the wires 00 as, leading to any suitable operating device V, which when shifted on the making of the circuit will permit the cage to be actuated by the elevator mechanism. Thus the device consists of an electromagnet drawing inone direction an armature Serial No. 24,578. (No model.)

carried in the opposite direction by .a spring and having a lug entering notches in the rim of a disk 31 on the shaft carrying the pulley 33, around which passes the control-rope 32. The terminals are insulated from their support in the jamb (or what is equivalent, the keeper-casing D) and are so arranged in relation to the bridge, latch, and keeper that before the latch is wholly disengaged from the keeper the bridge will be out of engagement with the terminals, and, conversely, the latch will engage the keeper before the electric circuit is completed, so that the door must be locked before the elevator mechanism can be started, and the latter is prevented from operating if the latch is drawn back, even if not wholly disengaged from the keeper.

The bridge may be of any suitable construction and connected by any suitable means to be shifted as the latch is shifted. As shown, the bridge consists of two rods 7 7, projecting through the face-plate 8 of the latch-casing and through a bar 9, attached to the latch A. The pins slidein a guide-rib 10 and through insulating-sleeves 11 11 in said rib and in the face-plate and through a connecting-plate 12 and are insulated by washers l3 and a strip 14: of insulating material, and the plate 12 is also insulated by washers 15 from the rib 10, so that when the pins 7 7 make contact with the terminals the circuit is completed through said pins and the plate 12. Springs 16, surrounding the pins and bearing on the collars thereof and on the plate 12, serve to project the pins outward, but permit each to yield separately to pressure against the terminals 5 5. When, however, the latch moves outward, the pins will also be thrust outward by the springs.

The terminals may be of any suitable character, but as shown consist of metallic blocks secured by bolts 17 in an insulated block 18, secured in the keeper-casing. Nuts are provided on the inner ends of said bolts for connecting the conducting-wires thereto.

It is desirable to prevent the landing-doors from being unlocked until the elevator-cage is in proper position opposite one of the doors, and to this end I provide a detent H in the latch-casing and provide the keeper-casing with a contact-piece I for engaging and shifting the detent, with an arm J connected with the contact-piece and arranged to be moved by the cage when the latter is in proper position for the door tozopen. As shown, the detent H is a two-armed lever, the long arm with a shoulder for engaging the end of the lever 3 when the short arm makes contact with the contact-piece I as the door is closed. The contact-piece I projects through an opening in the face-plate of the keeper-casing and is connected with an arm 19 on a rock-shaft 20, passing through the keeper-casing and carrying outside the latter the arm J. A spring 21 thrusts the arm 19 and contact-piece outward, and both are drawn inward as the elevatorcage or a projection W thereof, Fig. 5, comes in contact with the arm J as the cage descends. It will be evident that the parts may be mounted directly in casings formed by parts of the doors or jambs and that they may be constructed and arranged in various different ways without departing from the main features of my invention.

As shown, the latch A is intended for a swinging door, the side of the head, as also the sides of the ends of the parts 11 11 and I, being likewise beveled, so that they will be forced inward into their casings as the door closes. I do not, however, limit myself to the use of a latch of this particular construction.

Without limiting myself to the precise construction and arrangement of parts shown, I claim- 1. The combination With the latch-casing, keeper-casing and the latch, of a bridge supported to slide in one of the casings, insulated terminals supported in the other casing and means whereby the bridge is withdrawn on moving the latch and is carried from the terminals before the latch escapes the keeper, substantially as set forth.

2. The combination with the latch-casing, keeper-casing and the latch, of abridge supported to slide in one of the casings, insulated terminals supported in the other casing, means whereby the bridge is withdrawn on moving the latch and is carried from the terminals before the latch escapes the keeper, a detent for locking the latch in engaging position,'an arm outside one of the casings, and connections whereby to move the detent, substantially as set forth.

8. The combination with a latch-casing, of a slidable latch, a bridge connected to slide with the latch and projecting outside the easing for engaging electric terminals to complete an electric circuit, a detent to prevent the movement of the latch and bridge, and means whereby the detent may be shifted from outside the casing, substantially as set forth.

4. The combination with a latch-casing, of a slidable latch, a bridge connected to slide with the latch and projecting outside the casing for engaging electric terminals to complete an electric circuit, a detent to prevent the movement of the latch and bridge, a keeper-casing supporting the electric terminals and an arm outside the keeper-casing, and connections whereby to shift the detent by moving said arm, substantially as set forth.

5. The combination of a latch-casing,keepercasing, and latch and bridge carried by the latch-casin g, electric terminals carried by the keeper-casing, of a detent for engaging the latch carried by the latch-casing, and an arm and detent actuating means carried by the keeper-casing, substantially as set forth.

6. The combination with a latch and its casing and keeper, of a slidable bridge connected to be shifted on the moving of the latch, a detent for retaining the latch, and means for throwing the detent into position as the latch engages the keeper, substantially as set forth.

7. The combination with a latch and its casing and keeper, of a slidable bridge connected to be shifted on the moving'of the latch, a detent for retaining the latch, means for throwing the detent into position as the latch engages the keeper, and an arm and connections for shifting the detent, substantially as set forth.

8. The combination with alatch and its casing and keeper, of a slidable bridge connected to be shifted on the moving of the latch, a detent for retaining the latch, means for throwing the detent into position as the latch engages the keeper, and an arm and connections adjacent to the keeper for shifting the detent, substantially as set forth.

9. The combination with a latch-casing, latch and slidable bridge, of a detent for retaining the latch, a keeper-casing provided with electric terminals for engaging the bridge, a contact-piece for engaging the detent, and an arm outside the keeper-casing for operating the contact-piece, substantially as set forth.

10. The combination of a latch-casing, a slidable latch, a bridge consisting of electrically-connected rods extending through the latch-casing and connected to move with the latch, substantially as set forth.

11. The combination of a latch-casing, a slidable latch, a bridge consisting of electrically-connected rods extending through the latch-casing and connected to move with the latch, a keeper-casing provided with insulated terminals for engaging the bridge, substantially as set forth.

12. The combination of a latch-casing, a slidable latch, a bridge consisting of electrically-connected rods extending through the latch-casing and connected to move with the latch, a detent for holding the latch, a keepercasing carrying terminals for engaging the bridge and with a rock-shaft having an arm, and a contact-piece for engaging the detent, and a lever on the shaft outside the casing, substantially as set forth.

13. The combination with the landing-doors of an elevator, of latch-casings and connected latches, slidable bridges thereon, keepercasings carrying insulated terminals arran ged to engage the bridges, and to break said engagement before the latch escapes the keeper,

minals and the elevator-actuating mechanism, detents for locking the latches, and 1evers connected to operate the detents and arranged in position to be shifted as the cage is brought opposite the landing-doors, substantially as set forth.

In testimony whereof I have signed my name to this specification in the presence of two subscribing Witnesses.

ANDREW M. COYLE.

Witnesses:

D. L. HOLBROOK, W. A. MORSE. 

